#include <SHA1.h>

Public Types
enum	REPORT_TYPE { REPORT_HEX = 0, REPORT_DIGIT = 1, REPORT_HEX_SHORT = 2 }

Public Member Functions
	CSHA1 ()
	~CSHA1 ()
void	Reset ()
void	Update (const UINT_8 *pbData, UINT_32 uLen)
bool	HashFile (const TCHAR *tszFileName)
void	Final ()
bool	ReportHash (TCHAR *tszReport, REPORT_TYPE rtReportType=REPORT_HEX) const
bool	ReportHashStl (std::basic_string< TCHAR > &strOut, REPORT_TYPE rtReportType=REPORT_HEX) const
bool	GetHash (UINT_8 *pbDest20) const

Private Member Functions
void	Transform (UINT_32 pState, const UINT_8 pBuffer)

Private Attributes
UINT_32	m_state [5]
UINT_32	m_count [2]
UINT_32	m_reserved0 [1]
UINT_8	m_buffer [64]
UINT_8	m_digest [20]
UINT_32	m_reserved1 [3]
UINT_8	m_workspace [64]
SHA1_WORKSPACE_BLOCK *	m_block

Detailed Description

Definition at line 221 of file SHA1.h.

Member Enumeration Documentation

enum CSHA1::REPORT_TYPE

Enumerator:

REPORT_HEX
REPORT_DIGIT
REPORT_HEX_SHORT

Definition at line 226 of file SHA1.h.

        {
                REPORT_HEX = 0,
                REPORT_DIGIT = 1,
                REPORT_HEX_SHORT = 2
        };

Constructor & Destructor Documentation

CSHA1::CSHA1 ( )

Definition at line 46 of file SHA1.cc.

{
        m_block = (SHA1_WORKSPACE_BLOCK*)m_workspace;
        Reset();
}

CSHA1::~CSHA1 ( )

Definition at line 54 of file SHA1.cc.

{
        Reset();
}

Member Function Documentation

void CSHA1::Final ( )

Definition at line 173 of file SHA1.cc.

Referenced by I3Identifier::createFromHash(), SimpleNcs::falsifyDelay(), SimpleNodeEntry::getFaultyDelay(), DHT::handleGetRequest(), and OverlayKey::sha1().

{
        UINT_32 i;
        UINT_8 pbFinalCount[8];
        for(i = 0; i < 8; ++i)
                pbFinalCount[i] = static_cast<UINT_8>((m_count[((i >= 4) ? 0 : 1)] >>
                        ((3 - (i & 3)) * 8) ) & 0xFF); // Endian independent
        Update((UINT_8*)"\200", 1);
        while((m_count[0] & 504) != 448)
                Update((UINT_8*)"\0", 1);
        Update(pbFinalCount, 8); // Cause a Transform()
        for(i = 0; i < 20; ++i)
                m_digest[i] = static_cast<UINT_8>((m_state[i >> 2] >> ((3 -
                        (i & 3)) * 8)) & 0xFF);
        // Wipe variables for security reasons
#ifdef SHA1_WIPE_VARIABLES
        memset(m_buffer, 0, 64);
        memset(m_state, 0, 20);
        memset(m_count, 0, 8);
        memset(pbFinalCount, 0, 8);
        Transform(m_state, m_buffer);
#endif
}

bool CSHA1::GetHash ( UINT_8 * pbDest20 ) const

Definition at line 249 of file SHA1.cc.

Referenced by I3Identifier::createFromHash(), SimpleNcs::falsifyDelay(), SimpleNodeEntry::getFaultyDelay(), DHT::handleGetRequest(), and OverlayKey::sha1().

{
        if(pbDest20 == NULL) return false;
        memcpy(pbDest20, m_digest, 20);
        return true;
}

bool CSHA1::HashFile ( const TCHAR * tszFileName )

Definition at line 142 of file SHA1.cc.

{
        if(tszFileName == NULL) return false;
        FILE* fpIn = _tfopen(tszFileName, _T("rb"));
        if(fpIn == NULL) return false;
        UINT_8* pbData = new UINT_8[SHA1_MAX_FILE_BUFFER];
        if(pbData == NULL) { fclose(fpIn); return false; }
        bool bSuccess = true;
        while(true)
        {
                const size_t uRead = fread(pbData, 1, SHA1_MAX_FILE_BUFFER, fpIn);
                if(uRead > 0)
                        Update(pbData, static_cast<UINT_32>(uRead));
                if(uRead < SHA1_MAX_FILE_BUFFER)
                {
                        if(feof(fpIn) == 0) bSuccess = false;
                        break;
                }
        }
        fclose(fpIn);
        delete[] pbData;
        return bSuccess;
}

bool CSHA1::ReportHash	(	TCHAR *	tszReport,
		REPORT_TYPE	rtReportType = `REPORT_HEX`
	)		const

Definition at line 204 of file SHA1.cc.

Referenced by ReportHashStl().

{
        if(tszReport == NULL) return false;
        TCHAR tszTemp[16];
        if((rtReportType == REPORT_HEX) || (rtReportType == REPORT_HEX_SHORT))
        {
                _sntprintf(tszTemp, 15, _T("%02X"), m_digest[0]);
                _tcscpy(tszReport, tszTemp);
                const TCHAR* lpFmt = ((rtReportType == REPORT_HEX) ? _T(" %02X") : _T("%02X"));
                for(size_t i = 1; i < 20; ++i)
                {
                        _sntprintf(tszTemp, 15, lpFmt, m_digest[i]);
                        _tcscat(tszReport, tszTemp);
                }
        }
        else if(rtReportType == REPORT_DIGIT)
        {
                _sntprintf(tszTemp, 15, _T("%u"), m_digest[0]);
                _tcscpy(tszReport, tszTemp);
                for(size_t i = 1; i < 20; ++i)
                {
                        _sntprintf(tszTemp, 15, _T(" %u"), m_digest[i]);
                        _tcscat(tszReport, tszTemp);
                }
        }
        else return false;
        return true;
}

bool CSHA1::ReportHashStl	(	std::basic_string< TCHAR > &	strOut,
		REPORT_TYPE	rtReportType = `REPORT_HEX`
	)		const

Definition at line 240 of file SHA1.cc.

{
        TCHAR tszOut[84];
        const bool bResult = ReportHash(tszOut, rtReportType);
        if(bResult) strOut = tszOut;
        return bResult;
}

void CSHA1::Reset ( )

Definition at line 60 of file SHA1.cc.

Referenced by I3Identifier::createFromHash(), CSHA1(), SimpleNcs::falsifyDelay(), SimpleNodeEntry::getFaultyDelay(), DHT::handleGetRequest(), OverlayKey::sha1(), and ~CSHA1().

{
        // SHA1 initialization constants
        m_state[0] = 0x67452301;
        m_state[1] = 0xEFCDAB89;
        m_state[2] = 0x98BADCFE;
        m_state[3] = 0x10325476;
        m_state[4] = 0xC3D2E1F0;
        m_count[0] = 0;
        m_count[1] = 0;
}

void CSHA1::Transform	(	UINT_32 *	pState,
		const UINT_8 *	pBuffer
	)

private

Definition at line 73 of file SHA1.cc.

Referenced by Final(), and Update().

{
        UINT_32 a = pState[0], b = pState[1], c = pState[2], d = pState[3], e = pState[4];
        memcpy(m_block, pBuffer, 64);
        // 4 rounds of 20 operations each, loop unrolled
        S_R0(a,b,c,d,e, 0); S_R0(e,a,b,c,d, 1); S_R0(d,e,a,b,c, 2); S_R0(c,d,e,a,b, 3);
        S_R0(b,c,d,e,a, 4); S_R0(a,b,c,d,e, 5); S_R0(e,a,b,c,d, 6); S_R0(d,e,a,b,c, 7);
        S_R0(c,d,e,a,b, 8); S_R0(b,c,d,e,a, 9); S_R0(a,b,c,d,e,10); S_R0(e,a,b,c,d,11);
        S_R0(d,e,a,b,c,12); S_R0(c,d,e,a,b,13); S_R0(b,c,d,e,a,14); S_R0(a,b,c,d,e,15);
        S_R1(e,a,b,c,d,16); S_R1(d,e,a,b,c,17); S_R1(c,d,e,a,b,18); S_R1(b,c,d,e,a,19);
        S_R2(a,b,c,d,e,20); S_R2(e,a,b,c,d,21); S_R2(d,e,a,b,c,22); S_R2(c,d,e,a,b,23);
        S_R2(b,c,d,e,a,24); S_R2(a,b,c,d,e,25); S_R2(e,a,b,c,d,26); S_R2(d,e,a,b,c,27);
        S_R2(c,d,e,a,b,28); S_R2(b,c,d,e,a,29); S_R2(a,b,c,d,e,30); S_R2(e,a,b,c,d,31);
        S_R2(d,e,a,b,c,32); S_R2(c,d,e,a,b,33); S_R2(b,c,d,e,a,34); S_R2(a,b,c,d,e,35);
        S_R2(e,a,b,c,d,36); S_R2(d,e,a,b,c,37); S_R2(c,d,e,a,b,38); S_R2(b,c,d,e,a,39);
        S_R3(a,b,c,d,e,40); S_R3(e,a,b,c,d,41); S_R3(d,e,a,b,c,42); S_R3(c,d,e,a,b,43);
        S_R3(b,c,d,e,a,44); S_R3(a,b,c,d,e,45); S_R3(e,a,b,c,d,46); S_R3(d,e,a,b,c,47);
        S_R3(c,d,e,a,b,48); S_R3(b,c,d,e,a,49); S_R3(a,b,c,d,e,50); S_R3(e,a,b,c,d,51);
        S_R3(d,e,a,b,c,52); S_R3(c,d,e,a,b,53); S_R3(b,c,d,e,a,54); S_R3(a,b,c,d,e,55);
        S_R3(e,a,b,c,d,56); S_R3(d,e,a,b,c,57); S_R3(c,d,e,a,b,58); S_R3(b,c,d,e,a,59);
        S_R4(a,b,c,d,e,60); S_R4(e,a,b,c,d,61); S_R4(d,e,a,b,c,62); S_R4(c,d,e,a,b,63);
        S_R4(b,c,d,e,a,64); S_R4(a,b,c,d,e,65); S_R4(e,a,b,c,d,66); S_R4(d,e,a,b,c,67);
        S_R4(c,d,e,a,b,68); S_R4(b,c,d,e,a,69); S_R4(a,b,c,d,e,70); S_R4(e,a,b,c,d,71);
        S_R4(d,e,a,b,c,72); S_R4(c,d,e,a,b,73); S_R4(b,c,d,e,a,74); S_R4(a,b,c,d,e,75);
        S_R4(e,a,b,c,d,76); S_R4(d,e,a,b,c,77); S_R4(c,d,e,a,b,78); S_R4(b,c,d,e,a,79);
        // Add the working vars back into state
        pState[0] += a;
        pState[1] += b;
        pState[2] += c;
        pState[3] += d;
        pState[4] += e;
        // Wipe variables
#ifdef SHA1_WIPE_VARIABLES
        a = b = c = d = e = 0;
#endif
}

void CSHA1::Update	(	const UINT_8 *	pbData,
		UINT_32	uLen
	)

Definition at line 114 of file SHA1.cc.

Referenced by I3Identifier::createFromHash(), SimpleNcs::falsifyDelay(), Final(), SimpleNodeEntry::getFaultyDelay(), DHT::handleGetRequest(), HashFile(), and OverlayKey::sha1().

{
        UINT_32 j = ((m_count[0] >> 3) & 0x3F);
        if((m_count[0] += (uLen << 3)) < (uLen << 3))
                ++m_count[1]; // Overflow
        m_count[1] += (uLen >> 29);
        UINT_32 i;
        if((j + uLen) > 63)
        {
                i = 64 - j;
                memcpy(&m_buffer[j], pbData, i);
                Transform(m_state, m_buffer);
                for( ; (i + 63) < uLen; i += 64)
                        Transform(m_state, &pbData[i]);
                j = 0;
        }
        else i = 0;
        if((uLen - i) != 0)
                memcpy(&m_buffer[j], &pbData[i], uLen - i);
}

Member Data Documentation

SHA1_WORKSPACE_BLOCK* CSHA1::m_block

private

Definition at line 279 of file SHA1.h.

Referenced by CSHA1(), and Transform().

UINT_8 CSHA1::m_buffer[64]

private

Definition at line 274 of file SHA1.h.

Referenced by Final(), and Update().

UINT_32 CSHA1::m_count[2]

private

Definition at line 272 of file SHA1.h.

Referenced by Final(), Reset(), and Update().

UINT_8 CSHA1::m_digest[20]

private

Definition at line 275 of file SHA1.h.

Referenced by Final(), GetHash(), and ReportHash().

UINT_32 CSHA1::m_reserved0[1]

private

Definition at line 273 of file SHA1.h.

UINT_32 CSHA1::m_reserved1[3]

private

Definition at line 276 of file SHA1.h.

UINT_32 CSHA1::m_state[5]

private

Definition at line 271 of file SHA1.h.

Referenced by Final(), Reset(), and Update().

UINT_8 CSHA1::m_workspace[64]

private

Definition at line 278 of file SHA1.h.

Referenced by CSHA1().

The documentation for this class was generated from the following files:

Public Types

Public Member Functions

Private Member Functions

Private Attributes

Detailed Description

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation